[2.x] Internal Cluster DNS names

src/Contracts/Dnsable.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace RenokiCo\PhpK8s\Contracts;
+
+interface Dnsable
+{
+    /**
+     * Get the DNS name within the cluster.
+     *
+     * @return string|null
+     */
+    public function getClusterDns();
+}

src/Kinds/K8sPod.php

@@ -2,6 +2,8 @@
 
 namespace RenokiCo\PhpK8s\Kinds;
 
+use Illuminate\Support\Str;
+use RenokiCo\PhpK8s\Contracts\Dnsable;
 use RenokiCo\PhpK8s\Contracts\InteractsWithK8sCluster;
 use RenokiCo\PhpK8s\Contracts\Loggable;
 use RenokiCo\PhpK8s\Contracts\Watchable;
@@ -16,7 +18,7 @@
 use RenokiCo\PhpK8s\Traits\HasStatusConditions;
 use RenokiCo\PhpK8s\Traits\HasStatusPhase;
 
-class K8sPod extends K8sResource implements InteractsWithK8sCluster, Watchable, Loggable
+class K8sPod extends K8sResource implements Dnsable, InteractsWithK8sCluster, Watchable, Loggable
 {
     use HasAnnotations;
     use HasLabels;
@@ -39,6 +41,18 @@ class K8sPod extends K8sResource implements InteractsWithK8sCluster, Watchable,
      */
     protected static $namespaceable = true;
 
+    /**
+     * Get the DNS name within the cluster.
+     *
+     * @return string|null
+     */
+    public function getClusterDns()
+    {
+        $ipSlug = Str::slug($this->getPodIps()[0]['ip'] ?? null);
+
+        return $ipSlug ? "{$ipSlug}.{$this->getNamespace()}.pod.cluster.local" : null;
+    }
+
     /**
      * Set the Pod containers.
      *

src/Kinds/K8sService.php

@@ -2,14 +2,15 @@
 
 namespace RenokiCo\PhpK8s\Kinds;
 
+use RenokiCo\PhpK8s\Contracts\Dnsable;
 use RenokiCo\PhpK8s\Contracts\InteractsWithK8sCluster;
 use RenokiCo\PhpK8s\Contracts\Watchable;
 use RenokiCo\PhpK8s\Traits\HasAnnotations;
 use RenokiCo\PhpK8s\Traits\HasLabels;
 use RenokiCo\PhpK8s\Traits\HasSelector;
 use RenokiCo\PhpK8s\Traits\HasSpec;
 
-class K8sService extends K8sResource implements InteractsWithK8sCluster, Watchable
+class K8sService extends K8sResource implements Dnsable, InteractsWithK8sCluster, Watchable
 {
     use HasAnnotations;
     use HasSelector;
@@ -30,6 +31,16 @@ class K8sService extends K8sResource implements InteractsWithK8sCluster, Watchab
      */
     protected static $namespaceable = true;
 
+    /**
+     * Get the DNS name within the cluster.
+     *
+     * @return string|null
+     */
+    public function getClusterDns()
+    {
+        return "{$this->getName()}.{$this->getNamespace()}.svc.cluster.local";
+    }
+
     /**
      * Set the ports spec attribute.
      *

tests/PodTest.php

@@ -156,6 +156,9 @@ public function runCreationTests()
         $this->assertTrue(is_string($pod->getHostIp()));
         $this->assertCount(1, $pod->getPodIps());
         $this->assertEquals('BestEffort', $pod->getQos());
+
+        $ipSlug = Str::slug($pod->getPodIps()[0]['ip']);
+        $this->assertEquals("{$ipSlug}.{$pod->getNamespace()}.pod.cluster.local", $pod->getClusterDns());
     }
 
     public function runGetAllTests()

tests/ServiceTest.php

@@ -80,6 +80,7 @@ public function runCreationTests()
         $this->assertEquals([[
             'protocol' => 'TCP', 'port' => 80, 'targetPort' => 80,
         ]], $svc->getPorts());
+        $this->assertEquals("{$svc->getName()}.{$svc->getNamespace()}.svc.cluster.local", $svc->getClusterDns());
     }
 
     public function runGetAllTests()